12155915423 has 2 divisors, whose sum is σ = 12155915424. Its totient is φ = 12155915422.

The previous prime is 12155915419. The next prime is 12155915459. The reversal of 12155915423 is 32451955121.

It is a happy number.

12155915423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12155915423 - 2² = 12155915419 is a prime.

It is a super-2 number, since 2×12155915423² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12155914423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077957711 + 6077957712.

It is an arithmetic number, because the mean of its divisors is an integer number (6077957712).

Almost surely, 2^12155915423 is an apocalyptic number.

12155915423 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155915423 is an equidigital number, since it uses as much as digits as its factorization.

12155915423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 38.

The spelling of 12155915423 in words is "twelve billion, one hundred fifty-five million, nine hundred fifteen thousand, four hundred twenty-three".